Sheet-piling.



A. A. FRIESTEDT.

SHEET FILING.

' Patented Oct. 12, 1909.

ARTHUR A. FRIESTEDT, OF CHICAGO, ILLINOIS.

SHEET-FILING.

Application filed December 9, 1907.

Specification of Letters Latent.

Patented Oct. 12, 1909.

Serial No. 405,719.

T 0 all whom it may concern:

Be it known that I, ARTHUR A. FRIESTEDT, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Sheet-Piling, of whichthe following is a specification.

This invention relates to improvements in the class of metalsheet-piling consisting of rolled beam sections 01' units capable ofbeing loosely joined edgewise in regular order, and locked againstdisplacement, when assembled in a continuous wall structure orinclosure.

The object of this invention is to provide a sheet-piling in which theweight is greatly reduced, the cost of production proportionatelylessened, the facilities for ease of handling increased in both drivingand withdrawing, by the diminution of the area of its cross-section andthe locating of short clip interlocks in such positions, made possibleby the beam structure itself, as to have the effect of making allsections identical and interchangeable one with another, and further,the creation of a sheet-piling section without a continuous interlock,that readily becomes choked with earth, which tends to materiallyincrease the resistance to the following section in driving.

The design of sheet-piling presented in this application, forms a singlewall at all points, on webs, intermediate to flanges of engagingsections when assembled and is adaptable to the variety of temporary andpermanent services for which a product of this character can beemployed.

The present invention will make possible the application of sheet-pilingin any unit length to the maximum practicable for rail or watertransportation, and within the province of rolling mill and fitting-shopcapacity.

This design of sheet-piling dispenses with the practice or requirementof a full length interlock, thereby reducing the weight per square foot,decreasing the time necessary for shop assemblement and lessening costof transportation, thus a decided economy for the consumer is eflectedin its purchase, besides an additional advantage in the matter of cost,made possible by improvements for convenience and ease in handling anddriving.

In the drawing, Figure 1 is a plan or end View of companion pilingsections in their assembled relation, which embody the im provedfeatures. Fig. 2 is an elevation in perspective of the same.

Each piling unit comprises a beam-section having flanged edges and ameans mounted thereon, adjacent to a portion of each. flanged edge,which in combination forms an interlock for the assembling of engagingsections.

The sections or units are duplicates, but for clearness in thisdescription, one section will be designated A and the other B. Thesections are of a different shape than those ordinarily used, in nothaving a web that lies in one plane in its entirety. In this instancethe web, while formed integral will be described as being composed ofthree parts. The central part 3 extends on a diagonal line, withreference to the parallel planes of web-parts at and 5 into whichitvanishes. This diagonal feature brings the web-parts 4 and 5 intodifferent planes, but in line with their companion parts on eachsection, when in assembled relation. The web-part at terminates in atapering flange 6, turned at a right-angle thereto, and the web-part 5terminates in a tapering flange 7 turned at right angles to its plane,and in an opposite direction to flange 6, thus locating the interlockingflanges 6 and 7 alternately on opposite sides when in assemblement asshown in Fig. 1. Although the interlocking flanges are located onopposite sides of their web, and are turned in opposite directions, theyare in exact aline ment by reason of the diagonal web feature.

The diagonal web-part being located in the center of each section andconnect-ing with or running into the straight parallel web-parts,provides all of the advantages of a corrugated surface, impartingstrength and stiffness to the sheet-piling section. The bracing effecton each section is precisely the same, thus insuring a uniform wallstructure without alternating strong and weak sections, nornecessitating the use of blocking or shims to support the webs of suchdesigns, as rest their interlocking parts against supporting wale orbracing timbers.

The uses of steel sheetpiling are so diversified, that in some of itsapplications, additional bracing and shoring must be resorted to, otherthan its inherent strength,

which is particularly necessary when utiliz ing it for cofferdams,caissons, and similar structures that are SllbjGOtBd to a heavy pressurefrom water or earth. Under such circumstances the pressure and supportof the bracing is distributed uniformly over each section, .which.avoids the crippling or weakening of the interlocking edges. Theconstruction of this sheet-piling section permits of the movement ofeach unsupported tapering flange and adjoining parallel webpart, whenunder pressure, respectively along the tapering flange and against itsadjoining web-part of the section with which it is in engagement, andwhose parts last referred to, are sustained by waling or bracing. Thisaction effects water-tightness, and obviates the necessity of woodcalkingstrips, rope, or any other auxiliary, other than the applicationof saw-dust or streetsweepings, applied to the pressure side of thestructure formed with the piling.

lVhen the sections are assembled the flanges 6 and 7 relativelyinterlock, as best shown in Fig. 1. In this instance the means employedfor loosely retaining the piling sections in their assembled relation,are short form Z-bar clips, which in reference to their position, forclearly describing their location, will be alluded to as being at theupper or lower end of sections.

The locking clips are rigidly secured to the upper ends of the sectionsby rivets or bolts 9, inserted through the clip-flange 10 and thestraight web-part 5 of each section, though the extreme upper ends ofthese clips need not necessarily be flush with upper edge of pilingsection, preferably some dis tance below it. The clips 8 are setparallel with and back far enough from flanges 7 of each section toprovide space 11 for the free entrance and engagement of the flangedpart of the next joining section.

The locking clips 12, which are shown in dark lines in Fig. 1, aresecured to the lower ends of the sections by means of rivets or bolts 13inserted through clip-flange 14 and the st 'aight web-part 1- of eachsection. The. clips 12 are set parallel with and back far enough fromflanges 6 of each section, to provide a space 15 for the free entranceand engagement of the flanged part of the next joining section. Thelower ends of clips 12 should be flush with the respective end of eachpiling section in all cases. The free upper flanges 16 and 17 of therespective clips 8 and 12 are positioned so as to overlap a portion ofthe back of the adjoining sections, in the operation of assembling incontinuous order.

It is to be noted that the locking clips mounted on the upper ends ofthe sections, are all located 011 the same side in their assembledrelation, and all the companion clips on the lower ends, are on theopposite side and opposite edge. This arrangement not only locates theupper and lower locking clips of each section on opposite sides,butpositions them relatively, as at the ends of a diagonal line drawnthrough the web-part of each section, thus making all sections interchangeable.

This form of a metal piling section having an angular web-part dividedinto different planes permits of its properties being increased ordiminished as circumstances may require. That is, increased bylengthening and broadening the flanges and proportionately widening oneor more of the web-parts without increasing the thickness thereof inobtaining greater strength; and diminishing by lessening the flanges andone or more of the webparts.

Two locking clips are shown on each section, but it is obvious that agreater number may be used and located intern'iediate with reference tothe end clips. Ordinarily two clips on each section will be sufficientbut extra heavy work might require more.

It should be understood, that in assembling, the sections telescopeendwise, but interlock edge-wise, the same as though the interlockingfeature extended the full length of each section.

Having thus described my invention, what I claim is- 1. A metalsheet-piling section having an interlock mounted on opposite sides andlocated at opposite ends thereof.

2. A metal sheet-piling section having an interlock located on oppositesides but not extending the whole length thereof.

3. A metal sheet-piling section having interlocking means mounted onopposite sides and positioned relatively, as at the end of a diagonalline.

4. A metal sheet-piling section having intel-locking means comprisingangle-clips mounted on opposite sides, said clips being positionedrelatively, as at the ends of a line drawn diagonally through the bodyof said section.

A metal sheet-piling section, comprising a web consisting of twostraight parts lying in parallel planes and connected by a diagonalpart, with short form locking clips located on opposite sides and atdiagonal corners.

In testimony whereof I aflix my signature, in presence of two witnesses.

ARTHUR A. FRIE STEDT.

Vitnesses L. B. COUPLAND, G. E. CHURCH.

